*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: "微软雅黑";
}

.content{
    width:1500px;
    margin: auto;
    
}
header>h1,header>p{
    
    text-align: center;
    color: white;
    margin-left: 80px;
}
header>p{
    transition: all 1s;
    opacity: 0;
    margin-top: 50px;
}
header>h1{
    opacity: 0;
    transition: all 1s;
    margin-top: 20px;
    margin-bottom: 20px;
  
}
header{
    width:100%;
    background: url(../img/sc1.jpg) no-repeat;
    background-size: 100% 100%;
    height: 700px;
    font-weight: bold;
    padding-top: 265px;
}
.tou{
    width: 1500px;
    height: 50px;
    display: flex;
    justify-content: space-between;
    padding: 0 10px;
    color: white;
    font-weight: bold;
    padding-top: 5px;
    position: fixed;
    top: -50px;
    z-index: 99;
    transition: all 1s;

}
.left img{
    vertical-align: middle;
}
.nav {
    display: inline-flex;
    position: relative;
  
    max-width: 100%;
    
    padding: 0 20px;
 
  
 }
  .nav-item {
    color: white;
    padding: 0 20px;
    padding-top: 10px;
    text-decoration: none;
    transition: 0.3s;
    margin: 0 6px;
    z-index: 1;

    font-weight: 500;
    position: relative;
 
 }
  .nav-item:before {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: #dfe2ea;
    border-radius: 8px 8px 0 0;
    opacity: 0;
    transition: 0.3s;
 }
  /* .nav-item:not(.is-active):hover:before {
    opacity: 1;
    bottom: 0;
 } */
  /* .nav-item:not(.is-active):hover {

 } */
 .jsxx{
     background: red;
     border-radius: 5px;
 }
  .nav-indicator {
    position: absolute;
    left: 0;
    bottom: 0;
    height: 4px;
    transition: 0.4s;
    height: 5px;
    z-index: 1;
    border-radius: 8px 8px 0 0;
 }
  @media (max-width: 580px) {
    .nav {
      overflow: auto;
   }
 }
 .baner{
     width: 100%;
     height: 595px;
     background: #f3f5f6;
    padding-top: 80px;
    position: relative;
     
 }
 .baner>p{
     margin-top: 40px;
   
 }
 .baner>h1,.baner>p{
    text-align: center;
    margin-left: 80px;
 }
 .baner>h1{
    opacity: 0;
    transition: all 1s;
    margin-top: 50px;
 }
 .baner>p{
    transition: all 2s;
    opacity: 0;
    margin-top: 50px;
 }
 .dire{
     border-bottom: 3px solid red;
     padding-bottom: 20px;
 }
 .tupian{
     width: 750px;
     height: 360px;
     margin: auto;
     background:url(../img/sc2.png);
     position: relative;
    margin-top: 30px;
    position: absolute;
    left: 28%;
    bottom: 0;
    overflow: hidden;
 }
 #img1{
    margin-left: 255px;
    height: 360px;
    z-index: 9;
    position: absolute;
    opacity: 0;
    transition: all 3s;
 }
 #img2{
     position: absolute;
     right: 145px;
     top: 360px;
     transition: all 1s;
        
 }
 .baner1{
     width: 100%;
     height: 520px;
     background: #2b353e;
 }
 #img3{
     height:100%;
     margin-left:30px;
     width: 480px;
     transition: all 1s;
     transform: scale(0.1);
 }
 #img5{
     transform: scale(0.1);
     transition: all 2s;
 }
 .qd{
     float: right;
     margin-right: 300px;
     color: white;
     height: 200px;
     margin-top: 200px;
     position: relative;
 }
 .qd>h1{
     opacity: 0;
     transition: all 2s;
 }
 .qd>p{
     margin-top: 80px;
     opacity: 0;
     transition: all 1s;
 }
 .five{
     width: 200px;
    position: absolute;
     height: 50px;
     margin-top: 70px;
     width: 510px;
     display: flex;
     justify-content: space-between;
     bottom: 40px;
     opacity: 0;
     transition: all 1s;

 }

 .five>div{
     border-radius: 50%;
     width: 80px;
     height: 80px;
 
     text-align: center;
     line-height: 70px;
 }
 .yi{
    border: 5px solid #005a6e;
        color: #0084f0;
 }
 .baner3>h1{
     transition: all 2s;

 }
 .baner3>p{
     margin-top: 0;
     transition: all 1s;
 }
.four{
    transition: all 5s;
    opacity: 0;
}
 .er{
    border: 5px solid #404d6e;
        color: #2b6eea;
 }
 .san{
    border: 5px solid #744244;
        color: #ff5345;
 }
 .si{
    border: 5px solid #10535a;
        color: #00b5d5;
 }
 .wu{
    border: 5px solid #3c4f42;
        color: #4da151;
 }
 .four{
     display: flex;
     width: 1000px;
     margin: auto;
     height: 300px;
    margin-top: 100px;
   
  
     display: flex;
     justify-content: space-around;
     padding-left: 50px;
 }
 .four>div{
     text-align: center;
 }
  .four>div p{
      margin-top: 10px;
  }
  .baner4{
      width: 100%;
      height: 500px;
      background: url(../img/sc5.jpg) no-repeat;
      background-size: 100% 100%;
      color: white;
      text-align: center;
      padding-top: 80px;
  }
  .baner4>h1{
      margin: 30px 0;
  }
  .baner5{
      height: 150px;
      width: 100%;
      line-height: 150px;
      background: white;
      text-align: center;
  }
  .baner5 button{
      border: 1px solid #7e7b75;
      width: 280px;
      height: 60px;
      background: transparent;
     border-radius: 5px;
      font-size: 20px;
     
  }
  .baner5 button:hover{
      color: red;
      cursor: pointer;
  }
  .footer{
      width: 100%;
      background: #000000;
      height: 75px;
      text-align: center;
      padding-top: 20px;
  }
  .baner4>h1{
      opacity: 0;
      transition: all 2s;
  }
  .baner4>p{
    opacity: 0;
    transition: all 2s;
    margin-top: 30px;
}
  .ky{
      border-bottom: 3px solid white;
      padding-bottom: 10px;
  }
  .jieshu{
      width: 700px;
      margin: auto;
      height: 30px;
    color: #a4a8a4;
      display: flex;
      cursor: pointer;
      justify-content: space-around;
        margin-bottom: 5px;
  }
  .jieshu div:hover{
      color: white;
  }